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Hybrid Vehicles Honda Civic Hybrid Honda Civic Hybrid
1765 messages, Last post on May 28, 2009 at 1:36 PM
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Mobil 1 Racing 0W-30 SAE Grade 0W-30 Viscosity, ASTM D 445 cSt  40ºC 56 cSt 100ºC 10.3 Viscosity Index, ASTM D 2270 175 Sulfated Ash, wt%, ASTM D 874 1.2 HTHS Viscosity, mPa·s 150ºC ASTM D 4683 2.99 Pour Point, ºC, ASTM D 97 -54 Flash Point, ºC, ASTM D 92 234 Density 15º C kg/l, ASTM D 4052 0.851 Mobil 1 0W-20 SAE Grade 0W-20 Viscosity, ASTM D 445 cSt 40º C 43 cSt 100º C 8.4 Viscosity Index, ASTM D 2270 165 Sulfated Ash, wt%, ASTM D 874 1.28 HTHS Viscosity, mPa·s 150º C ASTM D 4683 2.61 Pour Point, ºC, ASTM D 97 -57 Flash Point, ºC, ASTM D 92 232 Density 15º C kg/l, ASTM D 4052 0.855 The differences are almost negligible, but I still use 0W-20. Exxon does not list viscosity at 0C, but if you look at difference in viscosity for 0W-30 and 0W-20 from 40C to 100C. I can imagine that 0W-30 is more viscous at sub freezing conditions. You can see that by the lower pouring point of 0W-20 vs. 0W-30. But, all in all, any synth is better than dyno oil. |
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Replying to: budd (May 12, 2004 1:30 pm) The 7th gen Civic's fuel tank is shaped such that it is highly variable as to when you have actually filled the tank. I know this because on occasion I've put more gas in my Civic than the 13.2 Gal capacity and driven for 50 more miles before the guage moves off "F". Sometimes I know the tank isn't quite full despite the pump's auto shut off kicking in. You shouldn't manually fill the tank once the pump shuts off to avoid draining into the emissions system. Why is this importatnt to know? Because when you only drive 100 miles and then refill, your mpg could be way off depending on when the pump shuts off. Solution: Use at least 10 tankfuls of gas returning to the exact same pump every time. Calculate your mpg each time and average all 10 readings to arrive at a reasonably accurate number. It's possible to fill-up, drive 50 miles, fill-up again and the pump shuts off after only half a gallon added (pump shut-off calibrations differ at different pumps) and calculate your mpg to be 100. Of couse 100 mpg is impossible. |
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Replying to: mauto (Sep 28, 2004 4:50 pm) I've owned 12 cars in the last 25 years, and I have only once ever put more fuel than the tank was rated for, and that was only 0.1 more.....
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Replying to: larsb (Sep 29, 2004 6:17 am) ___I have owned 12 vehicles in the last 10 years and all have been able to be filled beyond specified capacity. Currently, the Corolla will hold > 15, the Insight > 14, and the MDX > 22. ___Good Luck ___Wayne R. Gerdes
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Replying to: xcel (Sep 29, 2004 4:11 pm)  I know for sure that the following cars did not hold more than their rated tank capacities, because in these cars I *HAVE* topped them off and tried to shove every ounce of gas I could in them before learning the evils of topping: 2001 Avalanche 2000 Tacoma 1997 Suburban 1998 CR-V 1996 Camry 1994 Maxima 1993 Q45 1992 Cressida 1990 Cressida 1987 Maxima 1984 Maxima My 12th car is the 2004 HCH, which I have not been able to put more than 12.5 in so far.
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Replying to: larsb (Sep 30, 2004 6:24 am) Wayne, so you are TOPPING OFF your tanks? You know that is a naughty thing to do.... ___Yes, I top off all my tanks and have been doing so for over 25 years. I have never been scolded for doing anything naughty in regards to fuel fillups however  With that, I have probably saved a few hundred gallons of fuel over the last 800,000 miles by not having to drive to the gas station and back nearly as often. ___Your evils are mistaken … ___I cannot speak of the entire list of automobiles you posted but your HCH is either a ULEV or PZEV. If it is a ULEV, you most certainly can fill it up with more then 12.5 gallons. What you are probably not taking into account is that you never drive any of them to low enough fuel to place the rated capacity of the tank in them. ___Good Luck ___Wayne R. Gerdes |
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Wayne, I stopped topping after doing a little research on the subject - check it out yourself and rid yourself of such an environmentally nasty habit which can also damage your catalytic converter.....even the EPA warns against it.... Yes, my HCH is a SULEV with a 13.2 gallon tank. I have yet to trust the gauge enough to drive it emptier....I will over time do so, however. |
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some articles for why you shouldn't be topping off your gas tank (just stop at the first click!): http://www.patgosscarworld.com/donttop.htm http://www.phillyburbs.com/pb-dyn/news/113-06292004-323947.html http://enviro2.blr.com/display.cfm/id/48985 http://www.sbcapcd.org/edu/dont-top-off.htm http://www.weights.az.gov/Shoppers/gasstations.htm http://www.viamagazine.com/top_stories/auto/how_bad99.asp |
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Hi Larsb: ___First off, if your HCH is a SULEV, it is the PZEV version. That being said, you only have a 11.9 gallon capacity tank. With that and the fact you have placed 12.5 gallons in it leads me to the conclusion that you have already surpassed the capacity of your HCH’s tank. The ULEV HCH on the other hand is a 13.2 gallon capacity tank. ___In regards to topping off, did you really think I haven’t read at least 100 more articles then the ones you have posted? How many times have I had problems? 0 in 800,000 miles. I don’t dump fuel all over the side of my car either as it is to precious a commodity to do so. With that, guess how many times your drive to the station and pumping gas in poor climate has caused you to wish you weren’t sitting at the pump filling your tank? How many more trips to the gas station and back have you wasted fuel for no apparent reason anyway? You may as well just pour fuel out on the pavement and light it off each time you don’t approach the actual range of your automobile less .2 to .4 gallons as it is such a waste to drive to the station and back needlessly which is what so many people do. ___I get the same stuff from those that think 50 #’s in your tires is a bad practice as well. You know, when burst pressures are closer to 125 – 150 #’s? Oh well, let us all close our eyes and keep wasting a precious commodity simply because it is the right thing to do. Blessed are those that don’t have a clue as to what there present automobiles are truly capable of  ___Good Luck ___Wayne R. Gerdes |
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Um, I think I started this whole fuel capacity debate so let me add this: When Honda (and others) say the Civic tank is 13.2 Gal, they probably don't mean that it's 13.2 if you fill it all the way up the fuel filler pipe until it pours out the hole. It's probably somewhere below that quantity. Therefore it seems that you can always squeeze more in (though you shouldn't). My original message had more to do with pump shut-off variances which directly affect MPG calculations. I've read numerous accounts of people getting 35mpg on one tank and then, miraculously, 50mpg on the next. This is not because the car found some new untapped efficiency, but because the 50mpg reading was calculated by a not quite refil of the tank - probably the pump shut off early and the driver thought, hey, 50 mpg!
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